138726028522 has 32 divisors (see below), whose sum is σ = 213487464960. Its totient is φ = 67592180160.

The previous prime is 138726028517. The next prime is 138726028531. The reversal of 138726028522 is 225820627831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4017772 + ... + 4052152.

It is an arithmetic number, because the mean of its divisors is an integer number (6671483280).

Almost surely, 2^138726028522 is an apocalyptic number.

138726028522 is a deficient number, since it is larger than the sum of its proper divisors (74761436438).

138726028522 is a wasteful number, since it uses less digits than its factorization.

138726028522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34798.

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 138726028522 in words is "one hundred thirty-eight billion, seven hundred twenty-six million, twenty-eight thousand, five hundred twenty-two".